Application of the Month
Ferrofluid Dispensing for Speaker
 
Ferrofluid is a conductive lubricant used for over 30 years in the speaker industry in the magnetic gap of the voice coil assembly. It serves as a lubricant, improves thermal power & damping, aids in voice coil centering, and reduces distortion.  The quantity dispensed is critical since it affects many of the speaker’s characteristics. In addition, Ferrofluid is a relatively expensive fluid, ranging from £250 to £500 per litre, and an accurate pump can pay for itself in fluid saved.

In addition to being extremely accurate, the FMI pump is a unique valveless design having only one moving part.  Sapphire-hard ceramic internal components resist wear and provide millions of dispenses without downtime for routine maintenance.  The linked article appeared in the June 2006 edition of Voice Coil magazine, and details the distinct advantages of using an FMI pump for Ferrofluid dispensing, and how the FMI pump virtually pays for itself in 18 days!.

Click here to see the full article about Ferrofluid

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